Parag engineering manufactures an oil immersed rotary vane type rotary high vacuum pump. The rotor carries two vanes and is mounted eccentric with the main body. As the rotor rotates, the vanes sweep the crescent shaped air space twice in each revolution. The vanes maintain close contact with the main body by spring force. An in-built non-return valve prevents back-flow of air.All moving parts are precisely machined and ground to close tolerances. The drive shaft carries an extra bearing to take the driving load of the pulley which otherwise results in fast wearing of bush, resulting in leakage and drop in vacuum.
